2008 年 2008 巻 7-3 号 p. 719-724
Information concerning the flow characteristics of pneumatic components is essential not only for selecting the right component at the design stage, but also for the simulation and the validation of different performances of a circuit. Recently, some works concerning the revision of the ISO 6358: 1989 standard [1] have concerned both the mathematical approximation of the mass flow rate characteristic [2] and the experimental way to obtain the characteristics [3, 4, 5]. This paper proposes to discuss the importance of the upstream and downstream pressures taken as references. Using experimental results, the flow behaviour of two real components is discussed pointing out two different cases, the first being close to a convergent nozzle, the second to a convergent-divergent nozzle.
